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201618

Sigma-Aldrich

Sudan Red 7B

Synonym(s):

Fat Red 7B, Fat red bluish, Solvent Red 19

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About This Item

Empirical Formula (Hill Notation):
C24H21N5
CAS Number:
6368-72-5
Molecular Weight:
379.46
Colour Index Number:
26050
Beilstein:
3534323
EC Number:
228-862-5
MDL number:
MFCD00003904
UNSPSC Code:
12171500
PubChem Substance ID:
24852014
NACRES:
NA.47
Pricing and availability is not currently available.

form

powder

Quality Level

200

technique(s)

microbe id | staining: suitable

mp

130 °C (dec.) (lit.)

solubility

acetone: 10 mg/mL

λmax

364 nm (2nd)
533 nm

ε (extinction coefficient)

≥14230 at 367-377 nm in toluene
≥24660 at 528-538 nm in toluene

application(s)

diagnostic assay manufacturing
hematology
histology

storage temp.

room temp

SMILES string

CCNc1ccc2ccccc2c1\N=N\c3ccc(cc3)\N=N\c4ccccc4

InChI

1S/C24H21N5/c1-2-25-23-17-12-18-8-6-7-11-22(18)24(23)29-28-21-15-13-20(14-16-21)27-26-19-9-4-3-5-10-19/h3-17,25H,2H2,1H3/b27-26+,29-28+

InChI key

VKWNTWQXVLKCSG-ZDXBJJIESA-N

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Application

Sudan Red 7B has been used to stain the fat bodies of Ostrinia nubilalis (Hübner) larvae.[1]

Biochem/physiol Actions

Sudan red 7B, also known as fat red, is a non-fluorescent stain.[2] It is effectively used to stain lipids and is used to indicate the presence of suberin in cell walls.[2][3][4] Sudan red 7B acts as a marker for formosan subterranean termite, Coptotermes fornosanus Shiraki.[5][6]

Storage Class Code

11 - Combustible Solids

WGK

WGK 3

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

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Certificates of Analysis (COA)

Lot/Batch Number
BCCM8159
BCCL6307
BCCK9917
BCCH8605
BCCD7081

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Borer (Lepidoptera: Crambidae) Dispersal from Small-Grain
Aggregation Plots
Reardon B J
Journal of Economic Entomology, 100, 1116-1123 (2007)
Sudan Red 7B, a Dye Marker for Coptotermes formosanus
Lai PY
Hawaiian Entomological Society., 277-282 (1983)
A.L. Smit
Root Methods: A Handbook (2013)
James L. Brewster
Onions and Other Vegetable Alliums (2008)
NAN-YAO SU
Material und Organismen: Materials and organisms. Materiaux et organismes (1980)
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Questions

  1. What is the solubility limit of this dye with acetonitrile, toluene, and decane?

    1 answer

    1. The solubility of this product is tested at 10mg/mL in acetone. It is not tested with other solvents. Other organic solvents noted are benzene, ethanol, methanol, chloroform, and DMSO, however no rate available. It may be helpful to refer to the literature for the use of acetonitrile, toluene, and decane as solvents.

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